Joke Collection Website - Mood Talk - Sudoku Jiugongge, help me solve two steps, tell me how to solve it? thank you

Sudoku Jiugongge, help me solve two steps, tell me how to solve it? thank you

Why are you here again? ! I booked you a fourth house earlier.

Okay, just two steps away.

The first house: upper right 1, middle left 9, lower right 7.

Reason: The numbers 2 and 8 in the fourth and seventh houses are in the first and third columns respectively, which means that the numbers 2 and 8 in the first house can only occupy the second column.

There are still three vacancies left in the first palace (upper right, middle left and lower right). Options 1, 7 and 9.

9 has appeared in the first row and the third row, indicating that the 9 of the first house must be in the left middle position. There is 1 at the bottom right. Make sure that 1 is at the top right, and then make sure that 7 is at the bottom right.